n = int(input())
x = list(map(int,input().split()))
y = list(map(int,input().split()))
mod = 998244353 

lis = []
for i in range(n):
    lis.append([x[i],"x"])
    lis.append([y[i],"y"])
    
lis.sort()

cntx,cnty = n,n
for i in range(n):
    if lis[i][1] == "x":
        cntx -= 1
    else:
        cnty -= 1
        
ans = 1
for i in range(n):
    if lis[i][1] == "x":
        ans *= cnty
        cnty -= 1
    else:
        ans *= cntx
        cntx -= 1
    ans %= mod
    
print(ans)